Spring perch and brake bracket remover



July 11, 1939.

s. MANDL SPRING PERCH AND BRAKE BRACKET REIOVER Fi led Dec; 27, 1951 Patented July 1-1, 1939 UNITED STATES SPRING PERCH BRAKE BRACKET REMOVER Siegmund Mandi, Milwaukee County, Wis assignor to Blackhawk Mfg. 00., Milwaukee, Wis., a corporation of Wisconsin Application December 2'1, 1937, Serial No. 181,980

ZClaims.

-My invention relates generally to improvements in devices for facilitating removal of relatively inaccessible parts of automobiles or the like, and relates more specifically to improve- 5 ments in the construction and operation of appliances for removing the perch bolts which normally secure the brake brackets to the axles ofvehicles.

A general object of the invention is to provide an improved jack attachment which may be conveniently and effectively employed to remove the perch bolts for the brake brackets from the axle beams of automobiles.

It is a rather tedius and slow job to remove the so-called perch bolts which normally attach the brake and spring brackets to the opposite ends of the front axles of modern automobiles, because of the irregular shapes of these brackets and of the numerous obstructions which surround the 2 brackets and their attaching bolts. Such removal of the perch bolts is often desirable for repair purposes, and since many garages have definite schedules of charges for renewal of .parts, it is desirable that replacements be made with minimum effort and loss of time. These perch bolts have heretoforebeen removed in various ways, as

' by removing the axle and driving the bolts out with presses, or with the aid of sledge hammers and heat applied to the axle, or with special tools having hooks adapted to engage the axle and cooperating with a jack screw. Another method used involved the use of a jack and cross beams, and adjustable chains embracing the axle on opposite sides of the bolts, but these chains would slip and would thus destroy the alinement of the jack plunger with the bolt. Unless the pressure thus applied is in perfect axial alinement with the perch bolt, it is not only difficult to remove these bolts, but damage to the axles may result,

a, and with theprior cross-beam and chain assemblages it was impossible to accurately aline' the drift pins and perch bolts so as to effect rapid and most effective removal of the latter.

My present invention therefore contemplates provision of a greatly improved attachment or assemblage, for expediting removal of perch pins r or the like from axle beams, and for insuring such removal without damaging adjacent parts.

Another specific object of my invention is to provide a new and useful implement for effecting removal of snugly fitted pins from the medial portions of beams, with minimum effort, the implement being especially adapted for use with a hydraulic jack. I

u A further specific object of the invention is the provision of an improved jack attachment which is simple, compact and durable in construction,

which may be readily applied to or removed from a jack assemblage, and which requires no expert knowledge for eflicient use thereof. 5'

The foregoing as well as other specificnobjects and advantages will be apparent from the following detailed description.

A clear conception of the several features constituting my present improvement, and of the 10 manner of constructing and of utilizing perch pin removers built in accordance with my invention, may be had by referring to the illustrative drawing accompanying and forming a part of this specification wherein like reference characters 15 designate the same or similar parts in the various views. I

Fig. 1 is a perspective illustration of a frag mentof the front portion of a standard automobile, showing one of my improved appliances in 20 position preparatory to the removal of one of the perch bolts;

Fig.2 is an enlarged central longitudinal section through the improved attachment, showing the same applied to fragments of a hydraulic jack 25 assemblage;

Fig. 3 is a further enlarged perspective view of the external or reaction element of the device;

Fig. 4 is a similarly enlarged perspective view. of the-.internal'or pusher element of the appliance; and

Fig. 5 is a fragmentary part sectional view showing the mode of cooperation of the improved tool with an axle.

While my invention has been specifically il- 35 lustrated herein, as being embodied in an attachment especially adapted for cooperation with a hydraulic jack and for use in ejecting perch pins from front axle beams, it is not my intention to thereby unnecessarily restrict the scope or range 0 of use of the improvement.

Referring particularly to Fig. 1 of the accompanying drawing, the standard automobile as.- semblage shown therein, comprises generally a main or front axle 6 upon which the body and 45 chassis structure I is mounted by means of springs 8 and shackles 9 pivotally suspended from brackets I0 having integral perch bolts ll.snugly fitting substantially vertical holes formed in the opposite end portions of the axle, 6; and wheels 12 m swingably journaled at the opposite extreme ends of the axle 6 and having brakes l3. operable by mechanism l4 associated with the brackets III, in

a well known manner. Because of the fact that the springs l and shackles 9, as well as numerous 5 other parts such as guards and bumpers, are 10- in close proximity to and around the brackets Ill and pins or bolts II, and that these perchbolts are frequently corroded and marred so as to firmly attach them to the axles 8;'it becomes quite a dimcult matter to remove .the brackets i9 and their anchoring bolts II. This difficulty is often increased by the distortion of parts, caused by accidents, especially when the axle 8v is bent and other structure is jammed against the brackets l and adjacent parts.

It is usual practice in removing perch bolts II, to remove the axles and to thereafter eject the bolts with presses, but with my invention it is possible to utilize a jack and the mechanism may be of any suitable type, either mechanically or hydraulically actuated. As shown in Fig. 1, the hydraulic jack mechanism employed is of the portable type, and consists of an outer member or cylinder I an inner member or plunger l6 (Fig. 2) movable longitudinally of the cylinder i5; a prssure producing pump H for creating hydraulic pressure between the cylinder l5 and plunger l6; and a flexible connection ill for conducting liquid to and from-the cylinder l5 and pump I 1, and vice. versa. The hydraulic jack assemblage is of well known construction and may be used for many other purposes, and a mechanical jack may obviously be substituted.

The improved bracket and perch bolt remover is shown generally in Fig. 1, and more in detail in Figs. 2, 3 and 4, and comprises a hollow outer reaction element l9 having an integral tubular tachment to the threaded end 2| of the cylinder l5,- and having its opposite end provided with a solid head 22 formed with a central bore 23 and with a tapered annular ridge 24 adjoining the bore; a pair of laterally spaced U-bolts 25 having depending threaded end port ons 26 insertible through holes 21 formed in the head 22 and adapted for the reception of clamping nuts 29; and a be freely endwise removable through the threaded 'end of the reaction element l9.

During normal use and operation of the im'-- proved-bracket remover; the elements I9, 29 should first be properly applied to the threaded ends 20, 2l, respectively, of the, relatively movable outer and inner jack members I5, l6, and the U-bolts should be applied to the axle 5 as shown in Fig.1, and the nuts 28 should thereafter be applied to the threaded ends 25 so as to force the annular ridge 24 of the element l9 into firm engagement withthe similarly formed recess in the bottom of the axle 5 adjoining the pin or bolt ll.' When the nuts 28 are manipulated so as to produce the final clamping 'efiect, the ridge 24 will be caused to snugly engage the recess in the axle and will thus bring the bore 23 into perfect axial alinement with the bolt II by virtue of the external taper of the ridge 24 which snugly engages the similarlytapered axle recess surrounding'the bolt H. During this application of the implement to the axle 6, the pusher elem-ment 29 will of course be retracted sumciently so as to permit proper application of the ridge 24 to the axle 8.. The pump I! may thereafter be manipulated so as to cause the pin 29 to slide upwardly within the bore 23 and to engage the lower end of the perch bolt l'l. Subsequent operation of the pump" will cause the element 29 to push the perchbolt I I out of its confining hole in the axle 6 and will elevate the bracket l0 until the latter is finally released and freely movable. The pusher element 29 may then be retracted,

the axle by removing the clamping nutsv 28.

From the foregoing detailed description it will be obvious that the present invention provides asimple, compact and durable tool for effecting rapid andconvenient removal of the perch bolts H, without danger of marring the adjoining structure. The U-bolts 25 are preferably formed so that when they are brought into clamping position, they will also tend to centralize the ridge 24 within its receiving-recess, and these *U-bolts will obviously firmly hold the element I9 so that the bore 23 thereof will be maintained in perfect alinement with the adjacent perch bolt H. The U-bolts 25, besides serving as effective means for clamping the element 29 to the axle, also are conveniently applicable and removable and occupy minimum space. The U-bolts 25 futhermore serve to uniformly distribute the clamping effect over the entire head 22, and this head 22 serves to guide the pin element 29 when the actual bolt removing pressure is being applied to the hydraulic jack. Thepresent invention has proven highly successful in actual commercial use, and will permit rapidand effective removal of the perch bolts with minimum loss of time.

It should be understood that it is not desired to limitv the invention to the exact details of construction or to the precise mode of operation, herein shown and described, for various modifications within the scope of the claims may occur to persons skilled in the art.

I claim:

1. In combination, a reaction element having one end formed for attachment to the normally stationary portion of a jack and having a bored head at-its opposite end provided with a tapered centering ridge adjoining the bore and snugly engageable with a similarly tapered recess in the work, a pushing element having oneend formed for attachment to" the movable member of the jack and having its opposite end portion slidable .within said bore, and laterally spaced rigid clamping elements coactingwith said head on opposite sides of said bore to clamp said ridge withinsaid recess.

and the perch bolt remover may be removed from 2. In combination, a reaction element having formed for attachment to the movable member of the jack and having its opposite end portion slidable within said hole, a pair of laterally spaced U-bolts coacting with said head on opposite sides of said bore, and adjustable nuts coacting with said U-bolts and with said head to clamp said ridge within said recess. v smqmmn mum... 

